<template>
    <view>
        <!--  -->
        <view class="riliWrapper">
            <view class="riliWrapperBox">
                <!-- 日历 -->
                <view class="signWrapperCalendar" v-if="true">
                    <view class="signWrapperCalendarBox">
                        <!--  -->
                        <swiper @change="_onClickSlideApi" duration="200" :current="slideDataListIndex" circular style="height:550rpx">
                            <swiper-item class="swiper-item" v-for="(calendar,indexa) in 3" :key="indexa" >
                            <view class="signWrapperCalendarBoxTop" >
                                {{year}}年{{month<10?'0'+month:month}}月
                            </view>
                            <view class="signWrapperCalendarBoxCenter">
                                <view class="signWrapperCalendarBoxCenterBox">
                                    <view class="signWrapperCalendarBoxCenterBoxTop">
                                        <div class="week-number">
                                            <span v-for="(item,index) in weekList" :style="{color:(index==0||index==weekList.length-1)&&themeColor}" :key="index">{{item}}</span>
                                        </div>
                                    </view>
                                    <view class="signWrapperCalendarBoxCenterBoxFooter">
                                        <view class="each-day" v-for="(dayTime,idx) in dayList" :key="idx" >
                                            <view :class="dayTime!=day+2 ?'eachDayBox':'eachDayBoxCheck'" v-if="day">
                                                <view class="eachDayBoxBox" :style="dayTime==day?'border-bottom: 1rpx solid #4E6EF2;':''">
                                                    {{dayTime?dayTime:''}}
                                                </view>

                                            </view>
                                        </view>
                                    </view>
                                </view>
                            </view>

                        </swiper-item>
                        </swiper>
                        <!--  -->
                    </view>

                </view>
            </view>

        </view>
        <!--  -->
    </view>
</template>
<script>
    export default {
        data() {
            return {
                weekList: ['日', '一', '二', '三', '四', '五', '六'],
                //  月份数组【2020-08-01   2020-09-01   2020-10-01】
                slideDataList:[],
                //  月份数组的索引
                slideDataListIndex:1,
                year:2020,
                month:10,
                day:10,
                dayList:[],
                start_time:'',  //  月初的时间戳
                end_time:'',    //  月末的时间戳
            };
        },
        created() {
            console.log('created')

            this._onLoad()
        },
        methods:{
            async _onLoad() {
                //  获取当前时间  赋值年，月
                await this.initTime()

                //  更新日历
                await this._runMonth()
            },
            //  初始化时间
            initTime() {
                var nowTimeData = this._getTimeNowApi()

                this.year = nowTimeData.year
                this.month = nowTimeData.month
                this.day = nowTimeData.day

                // 今日时间为：2020-9-16
                console.log('今日时间为：'+this.year+'-'+this.month+'-'+this.day)
            },

            async _runMonth() {
                console.log('==============================================================')

                //  获取当前月的每一天的数据    1~31
                await this.initApi()

                //  根据当前选择的年月，更新start_time   end_time
                await this._timeApi()

                console.log(this.start_time)
                console.log(this.end_time)
                //  更新记录
                // await this.onClickSignLog()

                let dataWeek = await this.getweek(this._getNowApi());

                // console.log(this._getNowApi())
                this.slideDataList[0] = []
                this.slideDataList[1] = dataWeek
                this.slideDataList[2] = []

                console.log(this.slideDataList)

                console.log('==============================================================')
            },

            _getTimeNowApi() {
                //  初始化时间
                var date = new Date();

                var year = date.getFullYear();
                var month = parseInt(date.getMonth()+1);
                var day = date.getDate();

                if (month < 10) {
                    month = '0' + month
                }
                if (day < 10) {
                    day = '0' + day
                }

                let returnData = {
                    year: year,
                    month:parseInt(month),
                    day:day,
                }

                return returnData
            },

            //  滑动日历触发（左右滑动）
            _onClickSlideApi(e) {

                let current = e.detail.current

                let oldIndex = this.slideDataListIndex

                this.slideDataListIndex = current

                if(oldIndex - current == -1 || oldIndex - current == 2){
                    console.log('向右滑动前一个月')
                    if (this.month == 12) {
                        this.year = this.year + 1
                        this.month = 1
                    } else {
                        this.month = this.month+1
                    }

                } else {
                    console.log('向左滑动后退一个月')
                    if (this.month == 1) {
                        this.year = this.year - 1
                        this.month = 12
                    } else {
                        this.month = this.month - 1
                    }
                }

                this._runMonth()
            },

            _getNowApi() {
                console.log('当前日期：'+this.year+'-'+this.month+'-'+this.day)

                let data = {
                    Day: 1,
                    Month: this.month,
                    Year: this.year
                }

                console.log(data)
                return data
            },
            //  获取当前月的每一天的数据
            initApi() {
                this.dayList = this.createDayList(this.month, this.year);
            },

            //创建每个月日历数据，传入月份1号前面用null填充
            createDayList(month, year) {
                const count = this.getDayNum(month, year),
                    _week = new Date(year + '/' + month + '/1').getDay();
                let list = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28]

                for (let i = 29; i <= count; i++) {
                    list.push(i)
                }
                for (let i = 0; i < _week; i++) {
                    list.unshift(null)
                }

                return list;
            },
            //计算传入月份有多少天
            getDayNum(month, year) {
                let dayNum = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]

                if ((year % 4 === 0) && (year % 100 !== 0) || (year % 400 === 0)) {
                    dayNum[1] = 29;
                }
                return dayNum[month - 1]
            },
            //  传时间获取月初月末时间
            _timeApi() {

                let startDate = this.year+'-'+this.month+'-'+this.day

                let startData = this._timeMonthStartApi(startDate+' 00:00:00')

                this.start_time = startData.time_int

                let endData = this._timeMonthEndApi(startDate+' 00:00:00')

                this.end_time = endData.time_int
            },
            _timeMonthStartApi(timeDate) {
                var date = new Date(timeDate);

                date.setDate(1);

                var month = parseInt(date.getMonth()+1);

                var day = date.getDate();
                if (month < 10) {
                    month = '0' + month
                }
                if (day < 10) {
                    day = '0' + day
                }

                let timeDateStart = date.getFullYear() + '-' + month + '-' + day;

                let returnData = {
                    time_type:'start_time',
                    time_int: Date.parse(timeDateStart+' 00:00:00')/1000,
                    time_date: timeDateStart,
                    year:date.getFullYear(),
                    month:month,
                    day:day,
                }

                return returnData
            },
            _timeMonthEndApi(timeDate) {
                var endDate=new Date(timeDate);
                var currentMonth=endDate.getMonth();

                var nextMonth=++currentMonth;
                var nextMonthFirstDay=new Date(endDate.getFullYear(),nextMonth,1);
                var oneDay=1000*60*60*24;
                var lastTime = new Date(nextMonthFirstDay-oneDay);
                var endMonth = parseInt(lastTime.getMonth()+1);
                var endDay = lastTime.getDate();
                if (endMonth < 10) {
                    endMonth = '0' + endMonth
                }
                if (endDay < 10) {
                    endDay = '0' + endDay
                }

                let timeDateEnd = endDate.getFullYear() + '-' + endMonth + '-' + endDay

                let returnData = {
                    time_type:'end_time',
                    time_int: Date.parse(timeDateEnd+' 00:00:00')/1000,
                    time_date: timeDateEnd,
                    year:endDate.getFullYear(),
                    month:endMonth,
                    day:endDay,
                }

                return returnData
            },
            //  2020-08-01
            getweek(date) {
                let weeks = [];
                let dates = this.getDates(date);
                // let len = Math.ceil(dates.weeks.length / 7);
                // for (let i = 0; i < len; i++) {
                    // weeks.push(dates.weeks.slice(i * 7, 7 + (i * 7)));
                // }
                // dates.weeks = weeks
                return dates;
            },
            getDates(date) {
                let dates = {
                    year: date.Year,
                    month: date.Month,
                    firstDay: new Date(date.Year, date.Month, 1).getDay(),
                    lastDay: new Date(date.Year, date.Month + 1, 0).getDay(),
                    endDate: new Date(date.Year, date.Month + 1, 0).getDate(),
                    weeks: []
                }

                //计算上月日期
                for (let i = dates.firstDay; i > 0; i--) {
                    let dateinfo = {};
                    dateinfo.date = new Date(date.Year, date.Month, -i + 1).getDate();
                    dateinfo.isClick = false;
                    dates.weeks.push(dateinfo);
                }
                //计算本月日期
                for (let i = 1; i <= new Date(date.Year, date.Month + 1, 0).getDate(); i++) {
                    let nowisClick = true;
                    let dateinfo = {};
                    dateinfo.date = i;
                    if (this.dateType == 'dateCustom') {
                        nowisClick = false;
                        if (this.dateCustom[dates.year] && this.dateCustom[dates.year][dates.month]) {
                            for (let j = 0; j < this.dateCustom[dates.year][dates.month].length; j++) {
                                if (this.dateCustom[dates.year][dates.month][j] == i) {
                                    nowisClick = true;
                                }
                            }
                        }
                    }
                    dateinfo.isClick = nowisClick;
                    dates.weeks.push(dateinfo);
                }
                //计算下月日期
                let len = 7 - dates.lastDay;
                if ((42 - dates.weeks.length) >= 7) {
                    len += 7;
                }
                for (let i = 1; i < len; i++) {
                    let dateinfo = {};
                    dateinfo.date = i;
                    dateinfo.isClick = false;
                    dates.weeks.push(dateinfo);
                }
                return dates;

            },

        }

    }
</script>